In HotS, Blizzard will be removing the D-8 charges from reapers (the special attack that makes them effective against buildings). Currently, I like to build a pack of reapers (6-8) and use them to plow through an enemies base when he doesn't have troops there or is distracted. Now, I'm wondering how I can use them effectively in a different way (especially when HotS comes out).
I've tried adding them to my bio unit composition, but just marines + marauders seems much more (cost) effective, especially with upgrades. I can see them uses as an early harass / annoyance, but that probably works only against Protoss and only before they have stalkers.
Blizzard said at one point that they nerfed them too much in WoL, and want to bring them to their full potential in HotS. So I assume that they do have a valid use besides as an anti-building specialist, but what is that?